Gravitation CDS Questions

CDS Physics

Gravitation MCQ Questions


1.
Newton's universal law of gravitation states that the gravitational force of attraction between two bodies is:
A.
Directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres
B.
Independent of both the masses involved and the distance between them
C.
Inversely proportional to the product of their masses and directly proportional to the distance between them
D.
Directly proportional to the sum of their masses and the distance between them
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ANSWER :
A. Directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres
2.
The numerical value of the universal gravitational constant 'G' was first experimentally measured by:
A.
Galileo Galilei
B.
Isaac Newton
C.
Johannes Kepler
D.
Henry Cavendish
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ANSWER :
D. Henry Cavendish
3.
The approximate value of the universal gravitational constant (G) is:
A.
3.14 x 10^-11 N m^2/kg^2
B.
9.8 x 10^-11 N m^2/kg^2
C.
6.674 x 10^-11 N m^2/kg^2
D.
6.674 x 10^11 N m^2/kg^2
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ANSWER :
C. 6.674 x 10^-11 N m^2/kg^2
4.
Gravitational force is best classified as a:
A.
Force that exists only near the surface of the Earth
B.
Contact force that requires the two bodies to physically touch
C.
Non-contact (action-at-a-distance) force that acts between any two masses in the universe
D.
Force that acts only between electrically charged particles
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ANSWER :
C. Non-contact (action-at-a-distance) force that acts between any two masses in the universe
5.
Which of Kepler's laws of planetary motion states that every planet revolves around the Sun in an elliptical orbit, with the Sun located at one focus?
A.
Kepler's second law (the Law of Areas)
B.
Newton's first law of motion
C.
Kepler's first law (the Law of Orbits)
D.
Kepler's third law (the Law of Periods)
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ANSWER :
C. Kepler's first law (the Law of Orbits)
6.
Kepler's second law (the Law of Areas) states that the line joining a planet to the Sun sweeps out:
A.
Equal areas in equal intervals of time
B.
Equal distances in equal intervals of time
C.
Equal angles in equal intervals of time
D.
Equal volumes in equal intervals of time
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ANSWER :
A. Equal areas in equal intervals of time